C＃逃生用加号（+）在POST HttpWebRequest的 [英] C# Escape Plus Sign (+) in POST using HttpWebRequest

问题描述

我有问题发送POST数据，其中包括像characteres+在密码字段，

<预类=郎-CS prettyprint-覆盖> 字符串POSTDATA =的String.Format（用户名= {0}&放大器;密码= {1}，anyname，+ 13Gt2）;


我使用HttpWebRequest和一个WebBrowser看到的结果，当我尝试的 HttpWebRequest的使用POST数据到该网站从我的C＃的WinForms登录的，它告诉我，密码不正确。 （在源代码[richTexbox1]和webBrowser1）。与我的另一个帐户尝试它，不包含+字，它让我登录正确（使用的字节数组，并将其写入流）

<预类=郎-CS prettyprint-覆盖> 字节[]的字节数组= Encoding.ASCII.GetBytes（POSTDATA）; //获取数据
request.Method =POST;
request.Accept =text / html的;
request.ContentType =应用/的X WWW的形式，进行了urlencoded
request.ContentLength = byteArray.Length;
方通流= request.GetRequestStream（）; //打开连接
newStream.Write（字节数组，0，byteArray.Length）; //发送数据。
newStream.Close（）; //这个效果很好，如果用户不包括符号


此的Question 我发现 HttpUtility.UrlEncode（）是逃避非法字符的解决方案，但我不能找出如何正确使用它，我的问题是，在与进行urlencode（）如何将数据发送到我的要求的正确？

这是我怎么一直试图小时，以它的工作，但没有运气，搜索结果
第一种方法

<预类=郎-CS prettyprint-覆盖 > 串了urlencoded = HttpUtility.UrlEncode（POSTDATA，ASCIIEncoding.ASCII）;
//request.ContentType =应用/的X WWW的形式，进行了urlencoded
request.ContentLength = urlEncoded.Length;
的StreamWriter WR =新的StreamWriter（request.GetRequestStream（），ASCIIEncoding.ASCII）;
wr.Write（urlencoded的）; //为密码错误，服务器返回。
wr.Close（）;


二法

<预类=郎-CS prettyprint-覆盖> 字节[] = urlEncodedArray HttpUtility.UrlEncodeToBytes（POSTDATA，ASCIIEncoding.ASCII）;
方通流= request.GetRequestStream（）; //打开连接
newStream.Write（urlEncodedArray，0，urlEncodedArray.Length）; //发送数据。
newStream.Close（）; //服务器告诉我同样的事情..


我觉得我做错了就如何URL编码必须发送的请求，我真的问一些帮助，请，我通过谷歌搜索，但没有找到有关如何编码的URL发送给更多信息的HttpWebRequest的..我很欣赏你的时间和精力，希望你能帮我。谢谢你。

解决方案

我发现我的答案使用 Uri.EscapeDataString 它正好解决我的问题，但不知何故，我不能 HttpUtility.UrlEncode 做到这一点。的 Stackoverflowing各地的，我发现这个问题即大约进行urlencode方法， MSDN 该文件告诉：

编码为URL字符串。

但我知道现在如果用于编码POST数据是错误（@Marvin，@Polity，感谢校正）。丢包后，我试过如下：

<预类=郎-CS prettyprint-覆盖> 字符串POSTDATA =的String.Format（用户名= {0}&放大器;密码= {1}，anyname，Uri.EscapeDataString（+ 13Gt2））;


POST数据被转换成：

<预类=郎-CS prettyprint-覆盖> // **输出
串的用户名= anyname;
字符串密码=％2B13Gt2;


Uri.EscapeDataString 中的 MSDN 说以下内容：

一个字符串，它逃过表示形式。

我想，这就是我一直在寻找，当我试图在上面，我可以张贴正确只要有数据，包括在FORMDATA的+字，但不知有多少了解他们。

这环节是真的很有帮助。

的 http://blogs.msdn.com/b/yangxind/archive/2006/11/09/don-t-use-net-系统-URI-unescapedatastring功能于网址decoding.aspx

非常感谢您的答案和你的时间，我非常感激。问候队友。

I'm having issues to send POST data that includes characteres like "+" in the password field,

string postData = String.Format("username={0}&password={1}", "anyname", "+13Gt2");

I'm using HttpWebRequest and a webbrowser to see the results, and when I try to log in from my C# WinForms using HttpWebRequest to POST data to the website, it tells me that password is incorrect. (in the source code[richTexbox1] and the webBrowser1). Trying it with another account of mine, that does not contain '+' character, it lets me log in correctly (using array of bytes and writing it to the stream)

byte[] byteArray = Encoding.ASCII.GetBytes(postData); //get the data
request.Method = "POST"; 
request.Accept = "text/html";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = byteArray.Length;
Stream newStream = request.GetRequestStream(); //open connection
newStream.Write(byteArray, 0, byteArray.Length); // Send the data.
newStream.Close(); //this works well if user does not includes symbols

From this Question I found that HttpUtility.UrlEncode() is the solution to escape illegal characters, but I can't find out how to use it correctly, my question is, after url-encoding my POST data with urlEncode() how do I send the data to my request correctly?

This is how I've been trying for HOURS to make it work, but no luck,

First method

string urlEncoded = HttpUtility.UrlEncode(postData, ASCIIEncoding.ASCII);
//request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = urlEncoded.Length;
StreamWriter wr = new StreamWriter(request.GetRequestStream(),ASCIIEncoding.ASCII);
wr.Write(urlEncoded); //server returns for wrong password.
wr.Close();

Second method

byte[] urlEncodedArray = HttpUtility.UrlEncodeToBytes(postData,ASCIIEncoding.ASCII);
Stream newStream = request.GetRequestStream(); //open connection
newStream.Write(urlEncodedArray, 0, urlEncodedArray.Length); // Send the data.
newStream.Close();  //The server tells me the same thing..

I think I'm doing wrong on how the url-encoded must be sent to the request, I really ask for some help please, I searched through google and couldn't find more info about how to send encoded url to an HttpWebRequest.. I appreciate your time and attention, hope you can help me. Thank you.

解决方案

I found my answer using Uri.EscapeDataString it exactly solved my problem, but somehow I couldn't do it with HttpUtility.UrlEncode. Stackoverflowing around, I found this question that is about urlEncode method, in msdn it documentation tells that:

Encodes a URL string.

But I know now that is wrong if used to encode POST data (@Marvin, @Polity, thanks for the correction). After discarding it, I tried the following:

string postData = String.Format("username={0}&password={1}", "anyname", Uri.EscapeDataString("+13Gt2"));

The POST data is converted into:

// **Output
string username = anyname;
string password = %2B13Gt2;

Uri.EscapeDataString in msdn says the following:

Converts a string to its escaped representation.

I think this what I was looking for, when I tried the above, I could POST correctly whenever there's data including the '+' characters in the formdata, but somehow there's much to learn about them.

This link is really helpful.

http://blogs.msdn.com/b/yangxind/archive/2006/11/09/don-t-use-net-system-uri-unescapedatastring-in-url-decoding.aspx

Thanks a lot for the answers and your time, I appreciate it very much. Regards mates.

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